Mechanical door opening or closing device



Y N'o. 748,848.

Y l PATNNTND JAN. 5, 1904. W. F. & J. DRIBSHMNNV MEGHANIGAL D003 OPENING0N CLOSING DEVIGN.

APPLIUATION FILED APE. 20. 1903.

N0 HODEL.

Wiss s ma mmm meas ca. Horan-nim msnm-mu mc.

rod is formed into a rack-bar 4.

Patented January 5, 1904.

PAT-.ENT

FFICE.

WILLIAM F. DRIESCHMAN AND JOHN DRIESCHMAN, OF SAN FRANCISCO, CALIFORNIA.

,MECHANICAL DOOR OPENING OR CLOSING DEVICE( SPECIFICATION formingpart ofLetters Patent No. 748,848, dated January 5, 1904. Application filedApril 20, 1903. Serial No. 153,454. (No model.)

To all whom it may concern:

Beit known that we, WILLIAM F. DsIEsoH- MAN and J oHN DRIEsoPLnAN,citizens of the United States, residingin the city and county 5 of SanFrancisco, State of California,have invented an Improvement inMechanical Door Opening or Closing Devices; and we hereby declare thefollowing to be a full, clear, and eX- act description of the same.

Our invention relates to a device for mechanicaily opening and closingdoors which are located at adistance from the point where the operationis conducted, such as streetdoors leading up liights of stairs to roomsor ll5 ats located at the head of the stairs.

It consists in a mechanism which'may be operated from 'the head of thestairs or other distant point and by which the latch of the door isfirst retracted, leaving the door free,

zo and the door is afterward opened by a further movement of themechanism.

Referring to the accompanying drawings,

Figure 1 isaperspective viewshowing the door opening and closing device.Fig. 2 is a plan 25 view of the bell-crank lever which operates thepinions. Fig. 3 is a side elevation-showing the catch that releases thedoor-latch. Fig. 4 is`a` sectionalview on the line a: of Fig. 2. i

'1n the present construction we have illustrated our device asapplicable for the opening of a door situated at the foot of a iiight ofstairs, the operating mechanism being 1ocated at the head.

A is a door of any ordinary construction, having a spring-pressed latchby which it is normally retained in a closed position.

2 is Ya rod of such length as to extend to the point where the operatorwill stand.' In

4o the present case we have shown this rod as extending along the wall,either concealed or otherwise, from the inner hinged side of the door toa point at-the head of a flight of.

stairs, as shown at 3. The upper end of this 5 is a pinion suitablyjournaled to engage the teeth of this rack-bar and having a handle 6 bywhich it may be turned apartial revolution, so as to move the rack-barand the rod longitudinally. 5o The rack-bar is kept in mesh with thepinion by any suitable guide.

As at present shown,

upon the door.

guide-rollers 7 are so held as to press against the back of therack-bar, holding it in mesh kand at the same time allowing it to slidefreely.

The lowerA end of the rod 2 is connected with one arm, 8, of abell-cranklever. vThe other arm, 9, of this lever has a pin which eu-Iers a slot in a link 10, and this link is connected by a pin 1l withone side of a centrally-pivoted toothed pinion l2 and in such a mannerthat a pull upon the link 10 will act through the eccentric pin 11 toturn the pinion a partial revolution. Tl'iispinion engages with a secondpinion 13, which is journaled in line with the hinges of the door, sothat whenY the pinion 12 is turned in the direction which it will be bya pull upon the rod 2 it will act to turn the pinion 13 in the reversedirection, and as this is connected vwith the door or its hinge/it willby its reverse movement open the door when the latingarm pivoted at 14and having va projec- 'tion 15 in line with the spring-latch of thedoor. This swinging arm 14 is connected by a rod'16 with one arm on thebell-crank lever 17, and the other arm of this bell-oranklever isconnected by a rod 18 with the arm l9 of the bell-crank lever whichactuates the dooropening pinions, so that when these connecting-rods arepulled they will force the projection l5 against the point of thespringlatch of the door and push it back, so that it will be idisengagedfrom the-catch. The swinging of the armpwhich carries the catch 15 islimited by a suitable stop, so that this arm will only move far enoughto disengage the door-latch and besubstantially in plane with thejamb-plate, so that the door-latch may slide freely when pressure isbrought In order to allow this operaA tionto take place before themovement of the pinions 12 and 13, the link 10 has the slot previouslydescribed in which the pin from the arm 9 is slidable, and when thefirst pull upon the rod 2 takes place this pin will first traverse theslot in the link 10, and as the bell-crank levez-.8 9 is turned a shortdistance during this movement it will act through the connecting-rods 1618 and bell-crank 17 to operate the disengaging device 15, aspreviouslydescribed. Afurtherpressure brought upon the parts by thecontinued movement of the lever-arm 6 will then cause the bellcranklever 8 9 to continue its turning, and it then acts through the pinions12,13 to swing the door back upon its hinges, as previously described.When the parts are released, the rod 2 is pushed in the oppositedirection by the action of a spring 19,contained in a chamber 20, whichstands in line with the upper end of the rod 2, so that the spring maypress against the rod. It will be seen that the reverse movement of therod, acting through the bell-crank lever and connections previouslydescribed, will first swing back the arm which carries the presser 15,so as to leave the door free to act, and will subsequently act throughthe pinions 12 13 to reverse the movement of the door and cause it toclose without any attention by persons passing in or out. We are thusenabled to perfectly control distant doors and open or close them atpleasure As the iirst movement of the bell-crank 9 moves the arm 14 andits stop 15 a limited distance to an arresting-stop, it will benecessary to provide a means to allow the further movement of the arm 9to actuate the pinions 12 13.` This means consists of a suliicientlystii and elastic spiral spring 22,interposed between the crank-arm andthe rod 18 and which will yield to allow the further movement.

Having thus described our invention, what We claim, and desire to secureby Letters Patent, is-

1. A door opening and closing device consisting of intermeshed pinions,one of which is in line with the door-hinges, a bell-crank lever,connections by which it actuates the second pinion, a rod connectingsaid bellcrank lever with a distant point, and means including a rackxed to the rod, a pinion engaging the rack and a lever for operating thepinion for reciprocating said rod.

2. A door opening and closing device consist-ing of intermeshed pinions,one of which is fixed upon the turning hinge-pin of the door, a slottedlink connecting with a pin eccentrically xed upon the other pinion, abell-crank lever one arm of which has a pin entering the slot in thelink, a latch-releasing device with connections between it and thebell-crank lever whereby the first movement of said lever acts torelease the latch while the link-pin is moving from one end t0 the otherof the slot, and the further movement of the bell-crank lever acts uponthe pinions to swing the door.

3. Inadoor opening and closing device having the actuating-rod, abell-crank lever and intermeshing pinions as shown, a slotted linkeccentrically connected with one of the pinions and having the slot inthe opposite end, a pin projecting from one arm of the bellcrank leverinto said slot and capable of free movement therein, a rod pivotallyconnected to move in unison with the bell-crank lever, and extendingacross below the door, a bellcrank lever fulcrumed in the door-casingwith which said rod connects, a` second rod connecting with the otherarm of said bellcrank lever, a swinging arm connected with the rod andhaving a projection in line with the door-latch, whereby the latter isreleased before power is applied to turn the pinions to open the door.

4. The combination in a dooropening mechanism of a latch-releasingdevice, intermeshing pinions one of which is fixed to a hinge-pin of thedoor, a bell-crank lever and a slotted link connecting with the secondpinion and connections between the latchreleaser and the bell-cranklever, a rod extending from the bell-crank lever to the point ofoperation, the upper end of said rod having rack-teeth formed upon it, apinion engaging said rack, a handle connected with the pinion-shaftwhereby the latter is turned to actuate the rack-bar and rod.

5. A device for opening and closing doors including a latch-releaser,intermeshed pinions and a bell-crank lever by which the latch-releaseris first actuated and the pinions are afterward turned to swing thedoor, a rod having one end connected with the bell-crank lever and theother extending to the point of operation, said rod having its upper endprovided with rack teeth and guiding-rollers against which the back ofthe rod travels, a pinion engaging the rack-teeth and having a lever bywhich it is turnable to retract the rod and open the door, and a springpressing against the end of the rod adapted to return it to its normalposition and close the door when released.

In witness whereof we have hereunto set our hands.

WILLIAM F. DRIESCHMAN. JOHN DRIESCHMAN. Witnesses:

S. H. NoURsE, JEssIn C. BRODIE.

IOO

